INVT GD20-5R5G-4 High Performance Compact Inverter VFD

The INVT GD20-5R5G-4 is a high-performance, compact Variable Frequency Drive (VFD) designed for demanding industrial applications. Boasting a robust 5.5kW (7.5HP) power rating, this VFD excels in delivering precise motor control, energy efficiency, and exceptional reliability. Its sophisticated design incorporates advanced features such as multiple programmable I/O, integrated braking unit, and comprehensive communication protocols, making it a versatile solution for a wide array of automation challenges. The GD20-5R5G-4 stands out with its high starting torque, enhanced overload capacity, and sophisticated control algorithms, ensuring optimal performance even under severe operating conditions.

Product Specifications

| Parameter             | Specification                                    |

| :-------------------- | :----------------------------------------------- |

| Model                 | GD20-5R5G-4                                      |

| Power Rating          | 5.5 kW / 7.5 HP                                  |

| Input Voltage         | 3-Phase, 380V-440V, 50/60Hz                      |

| Output Voltage        | 3-Phase, 0-Input Voltage                         |

| Rated Output Current  | 13.0 A                                           |

| Control Method        | Sensorless Vector Control, V/f Control           |

| Overload Capacity     | 150% of rated current for 60s                    |

| Frequency Resolution  | 0.01 Hz                                          |

| Operating Temperature | -10°C to +40°C (derating above 40°C)             |

| Protection Level      | IP20                                             |

| Dimensions (WxHxD)    | 150mm x 260mm x 170mm                            |

| Mounting Type         | Wall/Panel Mount                                 |

Core Features & Market Positioning

The INVT GD20-5R5G-4 positions itself as a premium, yet accessible, solution within the compact VFD market. Its core competitive advantage lies in its exceptional performance-to-size ratio, offering advanced sensorless vector control capabilities that rival larger, more expensive drives. This allows for precise speed and torque regulation, critical for applications requiring dynamic response and accurate positioning. Furthermore, the inclusion of an integrated braking unit as standard on this model simplifies system design and reduces external component costs, a significant differentiator for integrators. The GD20 series is engineered for robust operation in harsh industrial environments, featuring enhanced thermal management and high immunity to electrical noise, ensuring sustained reliability and minimal downtime.

Key Application Scenarios

The versatility of the INVT GD20-5R5G-4 makes it an ideal choice for a broad spectrum of industrial automation tasks. It is exceptionally well-suited for controlling pumps and fans in HVAC systems, offering precise flow and pressure management while significantly reducing energy consumption through variable speed operation. In the material handling sector, it provides smooth acceleration and deceleration for conveyors, crushers, and mixers, enhancing process efficiency and reducing mechanical stress. Its high starting torque and precise control are also invaluable in machine tool applications, such as CNC machines and packaging equipment, where accurate speed and torque are paramount for product quality and throughput. Textile machinery, printing presses, and general industrial machinery that require variable speed operation and robust control also benefit from the GD20-5R5G-4's capabilities.

Practical System Integration Guidance

Integrating the INVT GD20-5R5G-4 into existing or new systems is streamlined due to its user-friendly design and comprehensive documentation. For electrical connections, ensure the input power supply is properly isolated and meets the specified voltage and frequency requirements. Terminals for motor connections (U, V, W) should be securely fastened to prevent loose connections, which can lead to performance issues or safety hazards. Digital and analog input/output terminals offer flexible configuration for external control signals, sensors, and status feedback. Programming the VFD can be accomplished via the onboard keypad or through serial communication interfaces like Modbus RTU, enabling seamless integration with PLCs and SCADA systems. Initial parameter setup should focus on motor data auto-tuning to optimize performance for the specific motor being controlled, followed by setting application-specific parameters for speed, acceleration, deceleration, and protective functions.

Operation and Risk Mitigation

Safe and efficient operation of the INVT GD20-5R5G-4 is paramount. Always ensure the drive is properly grounded and that all safety interlocks are correctly wired and functional before energizing the system. Avoid operating the VFD in environments exceeding its specified temperature range or in locations with excessive dust, moisture, or corrosive substances, as this can lead to premature failure. During commissioning, perform gradual motor testing to monitor for any unusual noises or vibrations. Key fault codes, such as overcurrent (OC), overvoltage (OV), undervoltage (UV), and heatsink over-temperature (OH), indicate specific operational issues that require immediate attention. Refer to the user manual for detailed troubleshooting steps for each fault code, which may involve checking motor winding integrity, power supply stability, or the drive's internal components. Proper ventilation around the VFD is crucial for dissipating heat and preventing thermal shutdown faults.

Scalability & Long-Term Value

The INVT GD20-5R5G-4 offers excellent scalability and long-term value for industrial operations. Its modular design and support for various communication protocols, including Modbus, allow for straightforward integration into larger automation systems and existing plant networks, facilitating upgrades to IIoT and Industry 4.0 initiatives. The availability of expansion cards for additional I/O or specialized communication interfaces further enhances its adaptability to evolving operational requirements. INVT's commitment to continuous product development ensures compatibility with future control strategies and system architectures. Furthermore, the robust build quality and efficient motor control provided by the GD20-5R5G-4 contribute to extended equipment lifespan and reduced energy expenditures, offering a significant return on investment over its operational life.

Frequently Asked Questions

What are the main advantages of the INVT GD20-5R5G-4?

The INVT GD20-5R5G-4 offers high performance through advanced sensorless vector control. It provides precise motor speed and torque regulation for demanding applications. Its compact design saves panel space and simplifies installation.

This VFD features an integrated braking unit, reducing the need for external components. It also boasts excellent overload capacity and robust thermal management for reliable operation.

Key benefits include energy savings, extended equipment life, and simplified system integration. Its wide voltage range and multiple I/O options enhance its versatility.

How do I connect a motor to the INVT GD20-5R5G-4?

Connect the motor leads (typically U, V, W) to the corresponding output terminals on the VFD. Ensure secure connections to prevent electrical arcing or loose wiring.

Always verify that the motor's voltage and frequency ratings are compatible with the VFD's specifications. Incorrect wiring can damage the motor or the VFD.

Refer to the wiring diagram in the product manual for specific connection details and recommended cable types for optimal performance and safety.

What are the common applications for this VFD?

This VFD is ideal for pumps and fans in HVAC systems, offering precise flow control and energy efficiency. It is also widely used in material handling equipment like conveyors and mixers.

It excels in machine tools, packaging machinery, and textile equipment where accurate speed and torque are critical. Its high starting torque supports applications like extruders and crushers.

The GD20-5R5G-4 is suitable for various general industrial machinery requiring variable speed drive capabilities and robust control.

How do I perform motor auto-tuning on the GD20-5R5G-4?

Access the VFD's parameter menu and navigate to the auto-tuning function. Ensure the motor is securely connected but not under load during this process.

Initiate the auto-tuning sequence; the VFD will automatically detect motor parameters like resistance and inductance. This optimizes control performance.

After auto-tuning, save the parameters and perform a brief test run to confirm optimal operation. Re-tuning may be necessary if the motor is changed.

What are the key safety considerations when installing this VFD?

Ensure the VFD is properly grounded according to electrical codes and standards. Install a suitable emergency stop circuit to quickly de-energize the system.

Verify that all power is disconnected and locked out before performing any wiring or maintenance. Follow the manual's specific installation guidelines rigorously.

Use appropriate PPE and ensure adequate ventilation around the VFD to prevent overheating and maintain a safe operating environment.

Can the INVT GD20-5R5G-4 be controlled remotely?

Yes, remote control is achievable through its digital input terminals, allowing start/stop commands. You can also use analog inputs for speed reference signals.

The VFD supports communication protocols like Modbus RTU via its serial port. This enables integration with PLCs and SCADA systems for advanced remote operation.

Utilize optional communication cards for other network protocols if required, expanding remote control and monitoring capabilities significantly.

What is the overload capacity of the GD20-5R5G-4?

The INVT GD20-5R5G-4 can handle 150% of its rated current for up to 60 seconds. This ensures it can manage temporary high load demands effectively.

This overload capability is crucial for applications with high starting torque requirements or sudden load increases. It prevents nuisance tripping under normal transient conditions.

Exceeding these limits continuously can lead to drive overheating and potential damage. Always ensure your motor and application loads are within specified operational parameters.

How do I reset a fault on the INVT GD20-5R5G-4?

First, identify the specific fault code displayed on the VFD's screen. Consult the user manual to understand the cause of the fault.

Address the underlying issue, whether it's an overload, wiring problem, or environmental factor. Then, power cycle the VFD to clear most non-persistent faults.

For persistent faults, further troubleshooting or professional assistance may be required. Ensure the fault condition is fully resolved before attempting to reset.

What communication protocols does this VFD support?

The INVT GD20-5R5G-4 natively supports the Modbus RTU protocol via its RS485 serial interface. This is standard for industrial automation.

This allows for easy integration with PLCs, HMIs, and SCADA systems for monitoring and control. Parameter configuration can also be done remotely.

Optional communication expansion cards may be available for other protocols such as Profibus, DeviceNet, or Ethernet/IP, broadening its connectivity options.

What is the typical lifespan of this VFD?

With proper installation and regular maintenance, the INVT GD20-5R5G-4 typically offers a long operational lifespan. Key factors include operating environment and load conditions.

The primary wear components are cooling fans and capacitors, which may require periodic inspection and eventual replacement. Adhering to derating guidelines is crucial.

Following operational best practices, such as avoiding excessive thermal stress and ensuring clean power input, will maximize the VFD's service life.